An analogy for half-life

When you learn this, you'll probably see fractions used for the amount remaining:1 ---> 1/2 ---> 1/4 ---> 1/8 ---> 1/16 ---> 1/32When you do calculations, it is important to use decimal amounts:1 ---> 0.5 ---> 0.25 ---> 0.125 ---> 0.0625 ---> 0.03125